Its not about thinking you are better than others. It is about Standards and compatibility. You don't marrry a ex-convicted waste from outside your culture who has been muslim for only 1 month revoke your mehr in the process. Do you think marriage is a joke? Marriage is dignity.
If you believe girls are free to marry whomever then these girls would be viewed as cheap, cuz they sure as hell have no standards. How much do you think someone values themselves if they settle for left overs?
There is nothing jaahill about what
@Adolf-Hitler said
Prophet muhammed PBUH said: '' People are like gold and silver; those who were best in Jahiliyyah (Pre-Islamic Period of Ignorance) are best in Islam". He can judge ex-con reverts all he wants and make status based distinctions.